Can Eliquis (apixaban) cause muscle weakness?
Muscle weakness is not one of the most common side effects of Eliquis (apixaban), but it can occur indirectly. The main way Eliquis could be connected to muscle weakness is through bleeding. Serious bleeding can lead to anemia (low red blood cell count), which can cause weakness or fatigue.
If the weakness is severe or comes with other red-flag symptoms, it needs prompt medical attention.
When weakness after Eliquis could be a sign of bleeding
Contact urgent care or emergency services if muscle weakness is accompanied by signs of bleeding, such as:
- Unusual bruising or bruises that grow quickly
- Black or tarry stools, blood in stool, or vomiting blood
- Coughing up blood
- Severe headache, dizziness, fainting, confusion, or weakness on one side (possible brain bleed)
- Heavy or prolonged bleeding (including gums, nosebleeds, or unusually heavy periods)
- Shortness of breath, chest pain, or rapid heartbeat (possible significant anemia)
These symptoms are important because muscle weakness can be a downstream effect of blood loss on anticoagulation.
What else can look like “muscle weakness” while taking Eliquis?
People sometimes describe problems that feel like weakness but are actually something else, including:
- Anemia-related fatigue (from bleeding)
- Dehydration or low electrolytes
- Medication interactions or side effects from other drugs taken with Eliquis
- Muscle injury or nerve issues unrelated to apixaban
- Viral illness or other conditions that coincide with starting or continuing Eliquis
If the timing matches when Eliquis was started or the dose changed, that strengthens the need to evaluate for bleeding or anemia.
What to do if you’re experiencing muscle weakness on Eliquis
- Do not stop Eliquis on your own. Stopping abruptly can increase clot risk.
- Call your prescriber promptly to report the symptom, especially if it is new, worsening, or associated with bruising/bleeding.
- Ask whether you should get a blood count (hemoglobin/hematocrit) to check for anemia and whether any additional evaluation is needed.
How is Eliquis muscle weakness typically evaluated by clinicians?
Clinicians usually look for bleeding and anemia first when weakness occurs on an anticoagulant. Evaluation may include:
- A complete blood count (to assess anemia)
- Review of bleeding symptoms and recent changes in medications/doses
- Depending on symptoms, tests for occult bleeding (for example, stool testing) or imaging for neurologic symptoms
Medication risk factors that can raise bleeding risk (and weakness from anemia)
Bleeding risk can be higher with factors such as:
- Older age
- Prior history of bleeding
- Kidney problems
- Taking other medicines that increase bleeding risk (for example, antiplatelet drugs or some NSAIDs)
- Alcohol misuse
- Uncontrolled high blood pressure
- Recent surgery or trauma
If any of these apply, weakness should be reported promptly.
What symptoms mean “go now” rather than “wait for a call back”?
Go to the ER or call emergency services if weakness is sudden or severe, or if you have any of these:
- Signs of stroke: face drooping, arm weakness, speech trouble, sudden severe dizziness
- Severe headache or loss of consciousness
- Vomiting blood, black/tarry stools, or heavy uncontrolled bleeding
- Chest pain, shortness of breath, fainting
Quick clarification questions (so the right guidance fits)
If you want, share:
1) Your age and Eliquis dose (e.g., 5 mg twice daily or 2.5 mg twice daily)
2) When the weakness started relative to starting/changing Eliquis
3) Any bruising, nose/gum bleeding, black stools, blood in stool, or unusually heavy periods
4) Whether the weakness is generalized or in one area, and whether you have dizziness or shortness of breath
With that, I can help you narrow whether this sounds more like anemia/bleeding vs something unrelated and what to ask your clinician.
Sources
I don’t have the provided source text for Eliquis side effects or warnings in this chat, so I can’t cite specific references here. If you paste the relevant Eliquis prescribing information or safety sheet you’re using, I can accurately extract and cite the sections about muscle weakness, bleeding, and anemia.